Changes between Version 16 and Version 17 of GeneralImplementationConcept


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Timestamp:
May 18, 2011, 2:37:35 PM (14 years ago)
Author:
lnerger
Comment:

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  • GeneralImplementationConcept

    v16 v17  
    3030
    3131There are two possibilities to build a data assimilation system
    32  1. '''Offline mode:''' The model is executed separately from the assimilation/filter code. Output files from the model are used as inputs for the assimilation program.
    33  1. '''Online mode:''' The model code is extended by calls to PDAF core routines. A single executable is compiled. While running this single executable the necessary ensemble integrations and the actual assimilation is performed.
     32 1. '''Offline mode:''' [[BR]] The model is executed separately from the assimilation/filter code. Output files from the model are used as inputs for the assimilation program.
     33 1. '''Online mode:''' [[BR]] The model code is extended by calls to PDAF core routines. A single executable is compiled. While running this single executable the necessary ensemble integrations and the actual assimilation is performed.
    3434PDAF supports both the online and offline modes. Generally, we recommend to use the online mode because it is more efficient on parallel computers. However, the required coding is simpler for the offline than the online mode.
    3535
    36 The implementation concepts of the online and offline modes are described on separate pages:
     36The implementation concepts of the online and offline modes of PDAF are described on separate pages:
    3737 * [ImplementationConceptOnline Online mode: Attaching PDAF to a model]
    3838 * [ImplementationConceptOffline Offline mode: Separating model integrations and the assimilation step]